You can re-import the script from the YYMPS - it should have a bracket there
live_enum_add("flexpanel_position_type",{static:flexpanel_position_type.static,relative:flexpanel_position_type.relative,absolute:flexpanel_position_type.absolute})
I have no immediate explanation as to who could be stealing curly brackets from your file, but maybe it’ll stop if you make that a "static": instead of static:..?
Is the extension itself doing any kind of live code updating in the scripts? I just assumed there was some automated process that was getting caught on itself somewhere. If not, I'll have to bring it up in the GM Discord and possibly file a bug report when I have more information.
It's unfortunately common enough to happen several times in one dev session, though, so it gets really tedious to re-import the YYMPS every time. I'll start making more git commits to see if I can find any consistencies in why the problem starts.